Question: Who was the spouse of Marika Rokk in 1968-1-1?
Paraphrase: Who was Marika Rokk married to in January 1, 1968?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q48502 p:P26 ?s . ?s ps:P26 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1968')) }